Krasinski - who plays Jim Halpert on the sitcom - has now hinted to The Insider that The Office's fake documentary crew will play a key role in the final episode.

"We have a really rare opportunity," he explained. "We are not only bringing an end to a show that's been going for a long time, but bringing an end to a show that's been filmed by a fake documentary crew."

The actor added: "So, to play with characters who think they're really on camera is going to be fun to break down."

"I'm unbelievably proud to be a part of one that actually gets to end," he said in October. "Instead of being asked to leave, I actually get a shot at bringing the whole story and all the characters to a close."